Fuel injection valve

Abstract

The fuel injection valve described is characterized in that a perforated disk ( 23 ) is arranged downstream from a valve seat surface ( 29 ) of a valve seat body ( 16 ), the perforated disk ( 23 ) being held on the valve seat body ( 16 ) by a flat, disk-shaped perforated disk carrier ( 21 ). The perforated disk ( 23 ) has a full passage for a fluid and at least one inlet opening in a bottom functional layer. The perforated disk carrier ( 21 ) has a through opening ( 20 ), which is directly surrounded by an edge area ( 35 ), which is provided with formations ( 38 ) that reduce the spring constant of the perforated disk carrier ( 21 ).

1 . A fuel injection valve for fuel injection systems of internal combustion engines, having a longitudinal valve axis; having a valve closing body which interacts with a valve seat surface of a valve seat body; having a perforated disk downstream from the valve seat surface, the perforated disk having a full through passage for a fluid and at least one inlet opening in a top functional layer and at least one outlet opening in a bottom functional layer; and having a disk-shaped perforated disk carrier, which is firmly attached to the valve seat body and through which the perforated disk is held on the valve seat body, and the perforated disk carrier having a through hole, characterized in that the perforated disk carrier ( 21 ) is provided with formations that reduce the spring constant of the perforated disk carrier ( 21 ) in an edge area ( 35 ) surrounding the through hole ( 20 ).  
     
     
         2 . The fuel injection valve according to  claim 1 , characterized in that the formation in the edge area ( 35 ) is designed as a peripheral shoulder ( 38 ).  
     
     
         3 . The fuel injection valve according to  claim 2 , characterized in that the shoulder ( 38 ) is made starting from the top face ( 37 ) facing the valve seat body ( 16 ) of the perforated disk carrier ( 21 ).  
     
     
         4 . The fuel injection valve according to  claim 2 , characterized in that the shoulder ( 38 ) is made starting from the bottom face ( 36 ) facing away the valve seat body ( 16 ) of the perforated disk carrier ( 21 ).  
     
     
         5 . The fuel injection valve according to  claim 1 , characterized in that the formations in the edge area ( 35 ) are designed as a plurality of slots ( 42 ) starting from the through opening ( 20 ).  
     
     
         6 . The fuel injection valve according to  claim 5 , characterized in that the slots ( 42 ) run radially in the form of a star.  
     
     
         7 . The fuel injection valve according to one of the foregoing claims, characterized in that the perforated disk ( 23 ) has at least two axially consecutive areas ( 32 ,  33 ,  34 ) having different outer diameters.  
     
     
         8 . The fuel injection valve according to  claim 7 , characterized in that the area ( 32 ,  34 ) of the perforated disk ( 23 ) having a larger diameter is squeezed between the edge area ( 35 ) of the perforated disk carrier ( 21 ) and the valve seat body ( 16 ).  
     
     
         9 . The fuel injection valve according to  claim 7  or  8 , characterized in that the area ( 33 ) having a smaller diameter of the perforated disk ( 23 ) fully traverses the through hole ( 20 ) of the perforated disk carrier ( 21 ).  
     
     
         10 . The fuel injection valve according to one of the foregoing claims, characterized in that the perforated disk ( 23 ) is secured against turning in the perforated disk carrier ( 21 ).  
     
     
         11 . The fuel injection valve according to one of the foregoing claims, characterized in that the perforated disk ( 23 ) can be manufactured by multilayer electroplating by forming a plurality of electrodeposited layers.